The PCRE library is a set of functions that implement regular expression pattern matching using the same syntax and semantics as Perl 5. PCRE has its own native API, as well as a set of wrapper functions that correspond to the POSIX regular expression API.

The PCRE library is a set of functions that implement regular expression pattern matching using the same syntax and semantics as Perl 5. PCRE has its own native API, as well as a set of wrapper functions that correspond to the POSIX regular expression API.

This is the ReportLab PDF Toolkit. It allows rapid creation of rich PDF documents, and also creation of charts in a variety of bitmap and vector formats.

Stapler is a pure Python alternative to PDFtk, a tool for manipulating PDF documents from the command line. It supports

• cherry-picking pages and concatenating them into a new file

• splitting a PDF document into single pages each in its own file

• merging PDF documents with their pages interleaved

• displaying metadata in a PDF document

• displaying the mapping between logical and physical page numbers

WeasyPrint helps web developers to create PDF documents. It turns simple HTML pages into gorgeous statistical reports, invoices, tickets, etc.

From a technical point of view, WeasyPrint is a visual rendering engine for HTML and CSS that can export to PDF and PNG. It aims to support web standards for printing.

It is based on various libraries but not on a full rendering engine like WebKit or Gecko. The CSS layout engine is written in Python, designed for pagination, and meant to be easy to hack on. Weasyprint can also be used as a python library.

Keywords: html2pdf, htmltopdf

The zathura-djvu plugin adds DjVu support to zathura using the DjVuLibre library.

fbida contains a few applications for viewing and editing images on the framebuffer.

This package provides a tool for doing everyday things with PDF documents. It can:

• Merge PDF documents or collate PDF page scans

• Split PDF pages into a new document

• Rotate PDF documents or pages

• Decrypt input as necessary (password required)

• Encrypt output as desired

• Fill PDF forms with X/FDF data and/or flatten forms

• Generate FDF data stencils from PDF forms

• Apply a background watermark or a foreground stamp

• Report PDF metrics, bookmarks and metadata

• Add/Update PDF bookmarks or metadata

• Attach files to PDF pages or the PDF document

• Unpack PDF attachments

• Burst a PDF document into single pages

• Uncompress and re-compress page streams

• Repair corrupted PDF (where possible)

The zathura-pdf-poppler plugin adds PDF support to zathura by using the poppler rendering engine.

Impressive is a tool to display PDF files that provides visual effects such as smooth alpha-blended slide transitions. It provides additional tools such as zooming, highlighting an area of the screen, and a tool to navigate the PDF pages.

PoDoFo is a C++ library and set of command-line tools to work with the PDF file format. It can parse PDF files and load them into memory, and makes it easy to modify them and write the changes to disk. It is primarily useful for applications that wish to do lower level manipulation of PDF, such as extracting content or merging files.

pydyf is a low-level PDF generator written in Python and based on PDF specification 1.7.

qpdfview is a document viewer for PDF, PS and DJVU files. It uses the Qt toolkit and features persistent per-file settings, configurable toolbars and shortcuts, continuous and multi‐page layouts, SyncTeX support, and rudimentary support for annotations and forms.

Xpdf is a viewer for Portable Document Format (PDF) files.

unpaper is a post-processing tool for scanned sheets of paper, especially for book pages that have been scanned from previously created photocopies.

Its main purpose is to make scanned book pages better readable on screen after conversion to PDF. Additionally, unpaper might be useful to enhance the quality of scanned pages before performing OCR.

Poppler is a PDF rendering library based on the xpdf-3.0 code base. Poppler gives access to the following binary programs:

• pdfattach

• pdfdetach

• pdffonts

• pdfimages

• pdfinfo

• pdfseparate

• pdfsig

• pdftocairo

• pdftohtml

• pdftoppm

• pdftops

• pdftotext

• pdfunite

The cpdf package provides a command-line tool and an OCaml library designed for manipulating PDF documents. Key Features include:

• Splitting and merging PDF files (including bookmark preservation and splitting on bookmarks).

• Encryption and decryption (supports AES 128 and AES 256).

• Page manipulation: scaling, rotation, cropping, and flipping; fitting pages to a specific size.

• Bookmark management: copying, removing, and adding bookmarks.

• Watermarking: stamping logos, page numbers, and multi-line text with transparency support.

• Text and font handling: embedding TrueType fonts, supporting Unicode UTF-8 input and output, and converting text to PDF.

• Presentation features: creating PDF-based presentations and arranging multiple pages on a single page.

• Annotation management: listing, copying, setting, and removing annotations.

• Metadata management: reading and setting document information and metadata.

• Attachment handling: adding and removing file attachments to documents or pages.

• Advanced features: thickening hairlines, blackening text, reconstructing malformed files, detecting missing fonts and low-resolution images, exporting/importing in JSON format, and building table of contents.

• Drawing: Adding graphics and text directly onto PDF files.

libHaru is a library for generating PDF files. libHaru does not support reading and editing of existing PDF files.

PDFCrack is a simple tool for recovering passwords from PDF documents that use the standard security handler.

PyPDF2 is a pure Python PDF library capable of:

1. extracting document information (title, author, …)

2. splitting documents page by page

3. merging documents page by page

4. cropping pages

5. merging multiple pages into a single page

6. encrypting and decrypting PDF files

By being pure Python, it should run on any Python platform without any dependencies on external libraries. It can also work entirely on StringIO objects rather than file streams, allowing for PDF manipulation in memory. It is therefore a useful tool for websites that manage or manipulate PDFs.

PoDoFo is a C++ library and set of command-line tools to work with the PDF file format. It can parse PDF files and load them into memory, and makes it easy to modify them and write the changes to disk. It is primarily useful for applications that wish to do lower level manipulation of PDF, such as extracting content or merging files.

Zathura is a customizable document viewer. It provides a minimalistic interface and an interface that mainly focuses on keyboard interaction.

PDFmarks is a technique that accompanies PDF, and that is used to store metadata such as author or title, but also structural information such as bookmarks or hyperlinks.

When Ghostscript reads the main PDF generated by the TeX system with embedded PDF files and outputs the final PDF, the PDF page mode and name targets etc. are not preserved. Therefore, when you open the final PDF, it is not displayed correctly. Also, remote PDF links do not work correctly.

This program is able to extract the page mode and named targets as PDFmark from PDF. In this way, you can obtain embedded PDF files that have kept this information.

Xournal is an application for notetaking, sketching, keeping a journal using a stylus.